This extension adds a small icon to every picture while hovering over it. When you click on that icon the picture is downloaded directly to your download folder.
You will never be asked again where you want to save the picture.
If you want to get in touch, please join the Google+ Community Image Download. (https://plus.google.com/u/0/communities/109075059138445967727)
Attention: The extension is in an early development state, there are some features to come and not everything is working perfect. If you have any tips or questions don't hesitate to contact us.